Uk'harimu, Great Gift-Giver

Vigilance, reach
Remove X +1/+1 counters from a permanent
you control: Look at the top X cards of your
library. You may cast a spell with mana value
X or less from among them without paying its
mana cost. Put the rest on the bottom of your
library in any order. Activate only as a sorcery.
"I give you gifts of strength, vitality and wisdom.
Use them well."